Rails - Jan 2008 - Custom form builders and form_tag?

Is it possible to use a custom form builder with form_tag?  It would
be nice to impose the same look and feel for all my forms, whether or
not they are model forms.
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On Jan 15, 4:30 pm, bigbanger
<bigbanger...-Re5JQEeQqe8AvxtiuMwx3w@public.gmane.org>
wrote:
> Is it possible to use a custom form builder with form_tag?  It would
> be nice to impose the same look and feel for all my forms, whether or
> not they are model forms.
OK, so it appears that form_tag doesn''t support form builders.  So how
do most Rails applications keep their non-model forms DRY?
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On Jan 16, 2008, at 12:02 PM, bigbanger wrote:
>
> On Jan 15, 4:30 pm, bigbanger
<bigbanger...-Re5JQEeQqe8AvxtiuMwx3w@public.gmane.org> wrote:
>> Is it possible to use a custom form builder with form_tag?  It would
>> be nice to impose the same look and feel for all my forms, whether or
>> not they are model forms.
>
> OK, so it appears that form_tag doesn''t support form builders.  So
how
> do most Rails applications keep their non-model forms DRY?
Why would you have a form and not a model?  You don''t have to make  
that model class inherit from ActiveRecord::Base and be associated  
with the database.  Create a class that has the fields (attr_accessor)  
that you need and use form_for.

(Full disclosure: I haven''t done this, but I''d be surprised if
it
didn''t work.)


 From
http://api.rubyonrails.org/classes/ActionView/Helpers/FormHelper.html#M000920
  at the bottom of the entry.

Customized form builders
You can also build forms using a customized FormBuilder class.  
Subclass FormBuilder and override or define some more helpers, then  
use your custom builder. For example, let‘s say you made a helper to  
automatically add labels to form inputs.
<% form_for :person, @person, :url => { :action =>  
"update" }, :builder => LabellingFormBuilder do |f| %> <%=  
f.text_field :first_name %> <%= f.text_field :last_name %> <%=  
text_area :person, :biography %> <%= check_box_tag
"person[admin]",
@person.company.admin? %> <% end %>
In many cases you will want to wrap the above in another helper, so  
you could do something like the following:
def labelled_form_for(name, object, options, &proc) form_for(name,  
object, options.merge(:builder => LabellingFormBuiler), &proc) end
If you don‘t need to attach a form to a model instance, then check out  
FormTagHelper#form_tag.


Does that help you out?

-Rob

Rob Biedenharn		http://agileconsultingllc.com
Rob-xa9cJyRlE0mWcWVYNo9pwxS2lgjeYSpx@public.gmane.org



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On Jan 16, 10:05 am, Rob Biedenharn
<R...-xa9cJyRlE0mWcWVYNo9pwxS2lgjeYSpx@public.gmane.org>
wrote:
> Why would you have a form and not a model?  You don''t have to make
> that model class inherit from ActiveRecord::Base and be associated
> with the database.  Create a class that has the fields (attr_accessor)
> that you need and use form_for.
>
> (Full disclosure: I haven''t done this, but I''d be
surprised if it
> didn''t work.)
Rob,

I thought about doing something like that, but wondered if there was a
better way.  But I think it *should* work and I''ll give it a try and
post back.

Thanks for the suggestion.

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I get the ''form_for''
I get ''partials''

But if I have a partial like

    <%= f.text_field :first_name %>
    <%= f.text_field :last_name %>
    <%= text_area :person, :biography %>
    <%= check_box_tag "person[admin]", @person.company.admin? %>

which I have been wrapping for my ''edit.rhtml'' with a

<% form_for(@person) do |f| %>
  <%= render :partial => ''form'' , :locals=>{:f =>
f}%>
  <%= submit_tag ''Save'' %>
<% end %>

Can I use that same partial/layout for a view?


-- 
There are two ways to slide easily through life: to believe
everything or to doubt everything; both ways save us from
thinking.           -- Alfred Korzybski

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